概括大意與完成句子(每題1分，共8分)
The Tiniest Electric MOtOr in the W0rId
1． Scientists recently made puhlic the tinjest electric motor ever huilt． You ld stuff hundrefls 0f them into the period at the end 0f this sentence． One day a similar engine might power a tiny me—chanical doetor that WOUld travel through your hodv t0 remove your disease．
2． The motor workshy shuffling atoms between two molten metal droplets in a carhon nanotube． One droplet is even smallerthan the 0ther． When a small electric current is applied to the droplets， atoms s10wly get out of the larger droplet and join the smaller one．The sinall droplet grows—hut never gets as big as the other droplet—and eventually humps i。nto the large droplet． As they touch，the large dmplet rapidly sops up the atoms it had prevviouslv lost． This quick shift in energy produces a power stroke．
3． The technique exploits the flact that surface tension——the tendeney 0f atoms or molecules to re一 sist separatl‘ng——becomes more important at small scales． Surfaee tension is the same thing that aUOWS some insects t0 walk on water．
4． Although the amount 0f energy produced is small--20 microwatts——it is quite inlpressive in relation t0 the tiny seale of the motor． The whole setup is less than 200 nanometers 0n a side． 0r hundreds of times smaIler than the width 0f a human hair． If it COUld he sealed uD to the size 0f an au— tomobile engine，it wonld be 1 00 milJion times more powerful than a Toyota Camry’s 225 horsepower V6 engine．
5． In 1988，Pmfessor Richard Muller and c0¨eagues made the first 0peratl’ng micromotor，which as 100 microns across，0r about the thickness of a human hair． In 2003，Zettl’s group created the first nanoscale motor． In 2006，they buih a nanoconveyor，which moves tiny panicles a10ng Iike carsin a factory。
6．Nanotechnology engineers try to mimic nature，building things atom-bv-atom-Among other things，nanomotors could be used in optical circuits to redirect light，a process called optical switching。Futurists envision a day when nanomachines，powered by nanomotors，travel inside yur body to find disease and repair damaged cells．
詞匯：
shuffle v．來回運(yùn)動
nanometer n．納米，毫微米
molten adj．熔化的
micromotor n．微電機(jī)
droplet n．小滴
nanotube n．納米管
Nanoconveyor n．納米傳送帶
nanotechnology n．納米技術(shù)
hump v．碰撞
mimic v．模仿
sop v．吸人
stroke n．行程，沖程
microwatt n．微瓦
nanomotor n．納米發(fā)動機(jī)
nanomachine n．納米機(jī)器
注釋：
1．Power stroke：動力行程
2．a(chǎn)t small scales：在小等級上。這里指的是“在納米等級上”。
3．it is quite impressive in relation to the tiny scale of the motor：與電動機(jī)的小等級相比，功率是相當(dāng)可觀了。in relation to是“與……相比”，如：The city is quite large in relation to its population．(就人口而言，這個城市相當(dāng)?shù)拇蟆?
4．Setup：裝置。這里指nanomotor。
5．If it could be scaled up to the size of an automobile engine：如果納米電動機(jī)能按比例放大到汽車發(fā)動機(jī)的尺寸。scale…up to是“把……按比例放大到……”。
練習(xí)：
1．Paragraph 2
2．Paragraph 4
3-Paragraph 5
4．Paragraph 6
A An introduction of a Toyota’s 225 horsepower V6 engine．
B A description of the nanomotor in terms of power and size。
C Surface tension．
D Previous inventions of nanoscale products．
E The working principle of the nanomotor．
F P0ssible fields of application in the future．
5．Doctors envision that the nanomotor wouht travel through human bodies to
6．Surface tension means the tendency of atoms or molecules to
7．Nanoconveyors could be used．t0
8．Applying a snmll electric current causes atoms to
A remove disease
B resist separating
C shuffle between two molten metal droplets
D power nanomachines
E Sop up molecules from the large droplet
F Transport nanoscale ob；iects
1．E．段落中有明顯的段落主題詞droplet(小滴)(該詞貫穿全段出現(xiàn))，但是小標(biāo)題被選項中沒有出現(xiàn)該題，因此推測該主題詞可能被隱含中段落小標(biāo)題中，接下來對該段落采取“z字閱讀法”，段首句說“該發(fā)動機(jī)(指代前段中提到的納米發(fā)動機(jī))通過納米管中在兩滴金屬溶液之間來回運(yùn)動的原子產(chǎn)生運(yùn)動”，段落中間的句子具體對這兩滴金屬溶液進(jìn)行介紹，段落結(jié)尾句說“這種能量的快速移動產(chǎn)生動力行程”，由此看出該段是在具體介紹納米發(fā)動機(jī)的工作原理。
2．B．段落中出現(xiàn)了大量代表典型細(xì)節(jié)信息的詞語：20 microwatts(微瓦)，200 nanometers (納米)，100 million times，225 horsepower(馬力)，這些細(xì)節(jié)信息貫穿全段，從性質(zhì)上分別用于描述功率和體積，因此可直接判斷B(描述了納米發(fā)動機(jī)的功率和體積)是答案。
3．D．段落中出現(xiàn)了貫穿全段的時間狀語：In 1988，In 2003，In 2006，由此判斷很可能該段是在介紹某樣?xùn)|西(很可能與納米發(fā)動機(jī)相關(guān))的發(fā)展歷史，因此D(發(fā)明納米發(fā)動機(jī)之前的一些納米等級的產(chǎn)品)是答案。其實段落中介紹了如體積大一些的納米發(fā)動機(jī)，微型發(fā)動機(jī)，納米傳送帶，納米機(jī)器等。
4．F．采用“z字型段落閱讀法”：段落段首句說“納米技術(shù)工程師試圖…”，段尾句說“預(yù)想家們預(yù)想有一天…”，段落主題詞為“納米發(fā)動機(jī)”，由此可見該段是在預(yù)想納米發(fā)動機(jī)的用途，因此F(在未來的可能用途)是答案。
5．A．題干出現(xiàn)doctors envision，選項的內(nèi)容應(yīng)與醫(yī)學(xué)有關(guān)，選項A是remove disease，正好與題干的內(nèi)容相配，是答案。短文第一段和最后一段也提到納米發(fā)動機(jī)進(jìn)入人體消滅病灶的可能性，證明了選A是正確的。
6．B．選B的依據(jù)是第三段第一句“surface tension—the tendency of atoms or molecules to resist separating—becomes more important at small sca]es”。
7．F．題干的nanoconveyor提示我們，納米傳送帶的功能自然是傳送納米等級的物體，所以，F(xiàn)是答案。
8．C．題干的Applying a small electric current…在第二段能找到，該段講的是納米發(fā)動機(jī)的工作原理。如果了解原子在兩小滴金屬熔液中來回運(yùn)動，產(chǎn)生動力，就會知道c是答案。
The Tiniest Electric MOtOr in the W0rId
1． Scientists recently made puhlic the tinjest electric motor ever huilt． You ld stuff hundrefls 0f them into the period at the end 0f this sentence． One day a similar engine might power a tiny me—chanical doetor that WOUld travel through your hodv t0 remove your disease．
2． The motor workshy shuffling atoms between two molten metal droplets in a carhon nanotube． One droplet is even smallerthan the 0ther． When a small electric current is applied to the droplets， atoms s10wly get out of the larger droplet and join the smaller one．The sinall droplet grows—hut never gets as big as the other droplet—and eventually humps i。nto the large droplet． As they touch，the large dmplet rapidly sops up the atoms it had prevviouslv lost． This quick shift in energy produces a power stroke．
3． The technique exploits the flact that surface tension——the tendeney 0f atoms or molecules to re一 sist separatl‘ng——becomes more important at small scales． Surfaee tension is the same thing that aUOWS some insects t0 walk on water．
4． Although the amount 0f energy produced is small--20 microwatts——it is quite inlpressive in relation t0 the tiny seale of the motor． The whole setup is less than 200 nanometers 0n a side． 0r hundreds of times smaIler than the width 0f a human hair． If it COUld he sealed uD to the size 0f an au— tomobile engine，it wonld be 1 00 milJion times more powerful than a Toyota Camry’s 225 horsepower V6 engine．
5． In 1988，Pmfessor Richard Muller and c0¨eagues made the first 0peratl’ng micromotor，which as 100 microns across，0r about the thickness of a human hair． In 2003，Zettl’s group created the first nanoscale motor． In 2006，they buih a nanoconveyor，which moves tiny panicles a10ng Iike carsin a factory。
6．Nanotechnology engineers try to mimic nature，building things atom-bv-atom-Among other things，nanomotors could be used in optical circuits to redirect light，a process called optical switching。Futurists envision a day when nanomachines，powered by nanomotors，travel inside yur body to find disease and repair damaged cells．
詞匯：
shuffle v．來回運(yùn)動
nanometer n．納米，毫微米
molten adj．熔化的
micromotor n．微電機(jī)
droplet n．小滴
nanotube n．納米管
Nanoconveyor n．納米傳送帶
nanotechnology n．納米技術(shù)
hump v．碰撞
mimic v．模仿
sop v．吸人
stroke n．行程，沖程
microwatt n．微瓦
nanomotor n．納米發(fā)動機(jī)
nanomachine n．納米機(jī)器
注釋：
1．Power stroke：動力行程
2．a(chǎn)t small scales：在小等級上。這里指的是“在納米等級上”。
3．it is quite impressive in relation to the tiny scale of the motor：與電動機(jī)的小等級相比，功率是相當(dāng)可觀了。in relation to是“與……相比”，如：The city is quite large in relation to its population．(就人口而言，這個城市相當(dāng)?shù)拇蟆?
4．Setup：裝置。這里指nanomotor。
5．If it could be scaled up to the size of an automobile engine：如果納米電動機(jī)能按比例放大到汽車發(fā)動機(jī)的尺寸。scale…up to是“把……按比例放大到……”。
練習(xí)：
1．Paragraph 2
2．Paragraph 4
3-Paragraph 5
4．Paragraph 6
A An introduction of a Toyota’s 225 horsepower V6 engine．
B A description of the nanomotor in terms of power and size。
C Surface tension．
D Previous inventions of nanoscale products．
E The working principle of the nanomotor．
F P0ssible fields of application in the future．
5．Doctors envision that the nanomotor wouht travel through human bodies to
6．Surface tension means the tendency of atoms or molecules to
7．Nanoconveyors could be used．t0
8．Applying a snmll electric current causes atoms to
A remove disease
B resist separating
C shuffle between two molten metal droplets
D power nanomachines
E Sop up molecules from the large droplet
F Transport nanoscale ob；iects
1．E．段落中有明顯的段落主題詞droplet(小滴)(該詞貫穿全段出現(xiàn))，但是小標(biāo)題被選項中沒有出現(xiàn)該題，因此推測該主題詞可能被隱含中段落小標(biāo)題中，接下來對該段落采取“z字閱讀法”，段首句說“該發(fā)動機(jī)(指代前段中提到的納米發(fā)動機(jī))通過納米管中在兩滴金屬溶液之間來回運(yùn)動的原子產(chǎn)生運(yùn)動”，段落中間的句子具體對這兩滴金屬溶液進(jìn)行介紹，段落結(jié)尾句說“這種能量的快速移動產(chǎn)生動力行程”，由此看出該段是在具體介紹納米發(fā)動機(jī)的工作原理。
2．B．段落中出現(xiàn)了大量代表典型細(xì)節(jié)信息的詞語：20 microwatts(微瓦)，200 nanometers (納米)，100 million times，225 horsepower(馬力)，這些細(xì)節(jié)信息貫穿全段，從性質(zhì)上分別用于描述功率和體積，因此可直接判斷B(描述了納米發(fā)動機(jī)的功率和體積)是答案。
3．D．段落中出現(xiàn)了貫穿全段的時間狀語：In 1988，In 2003，In 2006，由此判斷很可能該段是在介紹某樣?xùn)|西(很可能與納米發(fā)動機(jī)相關(guān))的發(fā)展歷史，因此D(發(fā)明納米發(fā)動機(jī)之前的一些納米等級的產(chǎn)品)是答案。其實段落中介紹了如體積大一些的納米發(fā)動機(jī)，微型發(fā)動機(jī)，納米傳送帶，納米機(jī)器等。
4．F．采用“z字型段落閱讀法”：段落段首句說“納米技術(shù)工程師試圖…”，段尾句說“預(yù)想家們預(yù)想有一天…”，段落主題詞為“納米發(fā)動機(jī)”，由此可見該段是在預(yù)想納米發(fā)動機(jī)的用途，因此F(在未來的可能用途)是答案。
5．A．題干出現(xiàn)doctors envision，選項的內(nèi)容應(yīng)與醫(yī)學(xué)有關(guān)，選項A是remove disease，正好與題干的內(nèi)容相配，是答案。短文第一段和最后一段也提到納米發(fā)動機(jī)進(jìn)入人體消滅病灶的可能性，證明了選A是正確的。
6．B．選B的依據(jù)是第三段第一句“surface tension—the tendency of atoms or molecules to resist separating—becomes more important at small sca]es”。
7．F．題干的nanoconveyor提示我們，納米傳送帶的功能自然是傳送納米等級的物體，所以，F(xiàn)是答案。
8．C．題干的Applying a small electric current…在第二段能找到，該段講的是納米發(fā)動機(jī)的工作原理。如果了解原子在兩小滴金屬熔液中來回運(yùn)動，產(chǎn)生動力，就會知道c是答案。